1. Robert Wood Johnson Clinical Scholars Program, Yale University, and Department of Medicine, Yale University School of Medicine, New Haven
2. Clinical Epidemiology Research Center, West Haven Veterans Affairs Connecticut Healthcare System, West Haven, and Department of Medicine, Yale University School of Medicine, New Haven
3. Department of Epidemiology and Public Health, Yale University School of Medicine, New Haven
4. Connecticut Hospice, Branford
5. Department of Epidemiology and Public Health, Yale University School of Medicine, New Haven, Connecticut, U.S.A.